DROBYSHEVICH, S. On classical behavior of intuitionistic modalities. Logic and Logical Philosophy, [S. l.], v. 24, n. 1, p. 79–104, 2014. DOI: 10.12775/LLP.2014.019. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2014.019. Acesso em: 21 jan. 2022.